wired/sha512_8h_source.html

#ifndef HASH_SHA512_H

#define HASH_SHA512_H


#include "common/platform/sys/syscall.h"


/* FIPS 180-4 SHA-512. Produces a 64-byte digest. */


#define SHA512_DIGEST 64

#define SHA512_BLOCK 128


typedef struct {

  u64 h[8];

  u64 total;

  u8  buf[SHA512_BLOCK];

  usz buf_len;

} sha512_ctx;


void sha512_init(sha512_ctx* s);

void sha512_update(sha512_ctx* s, const u8* data, usz len);

void sha512_final(sha512_ctx* s, u8 out[SHA512_DIGEST]);


/* One-shot convenience: digest of data[0..len). */

void sha512(const u8* data, usz len, u8 out[SHA512_DIGEST]);


#endif

sha512_ctx
Incremental SHA-512 state: running hash, total bytes absorbed, and the partial-block buffer.
Definition sha512.h:13

sha512_ctx::buf
u8 buf[SHA512_BLOCK]
partial-block buffer
Definition sha512.h:16

sha512_ctx::buf_len
usz buf_len
bytes pending in buf
Definition sha512.h:17

sha512_ctx::h
u64 h[8]
running hash state
Definition sha512.h:14

sha512_ctx::total
u64 total
total bytes absorbed (low 64 bits suffice here)
Definition sha512.h:15

syscall.h
Linux direct syscalls.

usz
u64 usz
unsigned size (size_t equivalent)
Definition types.h:20

u8
unsigned char u8
unsigned 8-bit integer / byte
Definition types.h:18

u64
unsigned long u64
unsigned 64-bit integer
Definition types.h:13